Investigation on the Influence of Gas Pressure on CO2 Arc Characteristics in High-Voltage Gas Circuit Breakers

Authors

  • Z. Guo State Key Laboratory of Electrical Insulation and Power Equipment, Xi an Jiaotong University, Xi an 710049
  • X. Li State Key Laboratory of Electrical Insulation and Power Equipment, Xi an Jiaotong University, Xi an 710049
  • Y. Zhang State Key Laboratory of Electrical Insulation and Power Equipment, Xi an Jiaotong University, Xi an 710049
  • X. Guo State Key Laboratory of Electrical Insulation and Power Equipment, Xi an Jiaotong University, Xi an 710049
  • J. Xiong State Key Laboratory of Electrical Insulation and Power Equipment, Xi an Jiaotong University, Xi an 710049

DOI:

https://doi.org/10.14311/ppt.2017.1.95

Keywords:

CO2, gas pressure, circuit breaker, Mayr equation

Abstract

CO2 is identified as a promising alternative gas of SF6. The magnetohydrodynamics (MHD) arc model is established for a CO2 circuit breaker. The influence of gas pressure is studied. The simulations are carried out for 0.5 MPa, 0.7 MPa and 0.9 MPa absolute filling pressure, allowing predictions of pressure and temperature distributions. The arc time constant θ and the power loss coefficient Q is extracted. The thermal interruption capability is estimated to grow with increasing filling pressure.

References

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Published

2017-10-15

Issue

Vol. 4 No. 1 (2017)

Section

Articles

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